{
  "manageEntity": {
    "action": "Save",
    "entityId": "817956282",
    "entityType": "Track",
    "nonce": "0x3cdfabb3eb718db40bd765b99775d3e3ae4434a597b70fea335abc0e9765a16b",
    "signature": "0xebfe0e47523a0135a260d164c93b8bca643c23ce3c00fc51a11fcc78eff218ab6e188d287a536541d7b4c22e8aed71571c1c240d79c2425ba2484e0398831d251b",
    "signer": "0xeD456650e887E16A8C17b2e80540dC4fe5884E4D",
    "userId": "730174537"
  }
}